Tensioning device for wires, cords, or metal rods



J. CHOBERT Aug. 22, 1933.

. TENSIONING DEVICE FOR WIRES, CORDS, OR METAL RODS Filed Jan. 16. 1933 nga J bel/li )NVN TQQ y i By I Patented Aug. 22, 1933 'UNITED STATES TENSIONING DEVICE FOR vWIR/ES, CORDS, OR METAL RODS Jacques Chobert, St.-Etienne, Loire, France Application January 16, 1933, Serial No. 652,050, and in France January 19, 1932 Claims.

The purpose of the present invention is to reduce as far as possible the vibrations in tensioning and traction members such as cables or rods mounted on board aircraft and the like.

5 further object is to diminish the weights of fittings for ensuring the xing and tensioning of the said cables.

A further object is to ensure the tensioning of these cables such as wires, cords and the like by preventing them from turning on their own axes in such a way as to preserve for them their entire mechanical resistance.

Devices which allow of the practical realization or" the foregoing aims are specied by the features l5 set forth in the description below as well as in the claims tabulated at the end oi the said description.

Devices conforming to the invention are shown by way of example in the annexed drawing estive and a longitudinal section taken N2 of l of a device according to the iii st method ci practically realizing the invention.

Fig. 3 is a partial section oi the said device taken on the line 3 3 of Fig. 2;

4 is a cross section taken on the line 4-4 oi' 3;

Figs. 5 and 6 are respectively a side View in perspective and a longitudinal section taken on the line 6--6 ci Fig. 5 in a device according to a second practical method of realization;

Fig. 7 is a View in perspective of the driving screw in the device of Figs. 5 and 6;

Figs. 8 and i) represent respectively a view in perspective and a longitudinal section taken on the line 9-9 of Fig. 8 in a device illustrating a method oi realization;

Fig. 10 is a view in perspective of the driving screw of the system shown in Figs. 8 and 9.

The system represented in Figs. 1-4 comprises essentially a fixing or mooring member 1, a wire .l5 securing thimble member 14 for the Wire or cable 5 a tensioning member 6 or the said cable 5. rThe lixing or mooring member l consists of a frame l having two branches 11 12; this frame is produced by cutting a blank from `a thin sheet of steel and by turning over the ends and forming the-n in such a way as to produce the two branches ai 'i the head 2.

A steel washer 8 forming a screw threaded boss is inserted into the head 2 by either a cold or a hot process and the washer after being enclosed l and 2 represent respectively a side view` in the head 2 cannot rotate about its axis relative to the body of the frame.

A screw threaded sleeve 6 which constitutes the tensioning member is screwed into the screw threaded washer 8.

The tensioning wire 5 passes into the axial channel 61 or" the threaded sleeve 6. The eXtremity of this wire 5 is secured by a tapered thimble 14 bearing on the edge of the threaded sleeve 6 owing to the tension of wire 5. This thimble 14 65 is lodged Ybetween the branches 11 12 of the body of the frame l, and, in Virtue of its ilattened form, can slide between the branches 11 l2 of the said frame l without being able to turn relatively thereto.

The thimble 14 comprises a hollow sheath of thin plate of a generally conical form. Within this sheath may be housed a boss 17 in the form of awedge. The extremity of wire 5 introduced by the opening 141 of the thimble 14 is wound about the boss 17 after the said boss ispositioned within the thimble 14; the tension of the wire 5 which is brought about by the advance of the threaded sleeve within the body of the frame 1 produces the jamming of the extremity of wire 5 between the thimble 14 and the boss 17; this boss 17 is itself held firmly at the bottom of the thimble 14 by means o the wire 5 which is wound about the said boss (Fig. 3). Y

The system thus produced takes up very little room because the thimble is completely housed between the branches 11 l2 of the frame; on the other hand, the division of the Weights is arranged ior under logical conditions; starting from the point of attachment represented by the frame l the next step is by the thimble wire attachment 14, thereafter by the threaded sleeve 6 and thereafter the stretched cord 5 is reached.

This logical distribution also avoids localized vibrations inasmuch as all the heavy pieces are located in the immediate neighbourhood of the point of attachment.

The system thus described may be produced in several dilerent ways and, more particularly, the frame l may be produced by cutting a blank from a thin metal band without any threading having to be cut in the metal sheet, and the X- ing screw 8 of the threaded sleeve 6 being inserted into the frame body.

In the second method of practical realization corresponding to Figs. 5-7, the body of frame 20 is formed by a cut strip band of sheet metal wound about a steel cylinder 9 (Fig. 7 the said cylinder 9, which forms the screw, being provided for this purpose with a threaded aperture 10.

In the third method of practical realization shown in Figs. 8-10, the system comprises a frame 25 of cut and folded sheet metal, va cylindrical and externally milled screw 13 bears upon the head 2 of the frame, and, by its rotation, keffects the advance of-'the threaded sleeve 6 which, in turn, ensures the tension of the cord 5.

By Way of summing up the arrangements thus produced show several advantages among which may be mentioned;

1. The wire securing thimble member is-y retained from any rotation relatively to the branches of the frame solely by virtue of' its generally flattened form and its` beingA lgcatedl between the branches of the said frame.

2. The wire securing thimble member,- al,- though located between the branches of the frame, may be put into position. on the extremity of the wire without the necessity of dismantling the anchorage of the branches of the frame.

3, Lastly, the retention of the Wire is all the more effectual the greater the pull on the wire.

What I claim. as my invention and desire. to secure by Letters Patent is:-

1. In a tensioning device for wires, cords or metallic rods, a fixing and mooring member, a hollow tensioning member adjustably mounted Within the foregoing xing member, a stretching wire passing through the hollow tensioning mem,- ber, a thimble member mountedon the extremity of the stretching wire, the said` thimble member being housed in the interior of the xing member iii $11.911.; e. wat that it. is ableiofsiide Within the saidmember, withouty powerltorotate and so that it. bears against the tensioning member.

2. In aY tensioning device for wires, lcords or metallic. reds, Mixing andfmoorine member 00nbeing housed in the interior of the ilxing member and bearing against the inner edge of the threaded sleeve.

3. In a tensioning device for wires, cords or metallic rods, a fixing and mooring member consisting of a frame having a smooth aperture, a boss inserted. into the body of the frame so as to beincapable of rotating relatively to the said frame body, this boss being provided with a threaded orifice of a diameter smaller than that ofthe orifice of the frame body, a sleeve threaded externally screwed into the inserted boss, mea-.11S provided on the threaded sleeve to ensure its rotation, a stretching wire or cord passing through` the channel of the threaded sleeve, a thimble member mounted on the extremity of the stretching Wire, the said thimble member being housed in the interior of the fixing member andl bearing against the inner edge of the threaded sleeve.

4, In a tensioning device for wires, cords or metallic rods, a xing and mooring member consisting of'a frame having a smooth orifice, a boss inserted into the b ody ofthe frame, the said boss having at one extremity, a threaded orifice of a diameter smaller-than that of the orice ofl the body of the frame, and at the other extremity, means adapted to make the said bossV rotate, a sleeve threaded externally and screwed into the inserted boss, astretching wire orcordv passing through the channel ofI the threaded sleeve, a thimble member mounted on the extremity of the stretching wire, the saidthimble` member being housed inthe interiorof the-fixing member and bearingagainst the inner edge of thethreaded sleeve.

5. In a tensioning device for wires, cords or metallic rods, a fixing and. mooring` member, a hollow. tensioning member adjustably mounted Within the foregoing fixing member, a stretching Wire passing throughthe hollowtensioning member, a hollow thimble fitted. toy the extremity of wire, the said; thimble being located within the fixing. member, and bearing;v against the tensioning member, a wedge serving thereon to Wind theA end of the wire and engaging Within. the hollow thimble so astosecure the Wire thereto.

JACQUES CHOBERT. 

